You should sit, with the baby in your lap
Photography
A place to politely discuss the tools, technique and culture of photography.
This is not a good place to simply share cool photos/videos or promote your own work and projects, but rather a place to discuss photography as an art and post things that would be of interest to other photographers.
Personally, I don't see the issue. I'm going to go the polar opposite of most of the other comments telling you how to hide your height and say stand tall and proud. Or short, or however this post finds you. I hope you totally rock your natural appearance!
Appearance wise I'm sure I check all the boxes for things that need to be "fixed", but you only get but a short time on this planet and I'm going to let haters hate and not sweat the rest.
Put Kevin up front so he looks as tall as his wife.
I like the couch idea. Also gives a lot more ideas for portraits other than some senior portrait dystopia
What about a slope effect, where you have the heights going from shortest to tallest. Like one person kneeling one crouching one crouching less and so on. You could crouching if you didn't want to be the tallest. I think it would give an interesting fun look to your pics. *